Core Advantages

• Mara Tape / Mylar Insulation Tape — Industry Standard for Transformer Winding
  
  Recognized worldwide as"Mara tape"in transformer and motor manufacturing, this deep yellow PET insulation tape is the established inter-layer insulation material for transformer coil winding — delivering dielectric strength ≥ 5kV, consistent 150°C thermal performance, and compatibility with varnish impregnation and oven curing processes standard in transformer production.
• Deep Yellow PET Tape for PCB Masking — Wave Soldering & SMT
  
  Used for masking gold fingers, edge connectors, and solder-free zones during PCB wave soldering, SMT reflow, and selective soldering — the deep yellow color provides clear visual identification of masked areas, and clean residue-free removal protects PCB pad surfaces and gold finger contacts.
• 150°C Continuous / 180°C Short-Term Heat Resistance
  
  Rated for 150°C long-term use and 180°C short-term peaks — covering transformer oven curing cycles, PCB soldering temperatures, and motor coil impregnation processes without adhesive migration or deep yellow PET film deformation.
• Direct Manufacturer — Full OEM Control
  
  6,000m² facility with 8 automated coating lines. Consistent batch quality and competitive pricing from sample to mass production.
• Globally Certified Quality
  
  ISO9001:2015 | UL94 | VTM-2 certified. Trusted by 100+ industrial partners across transformer manufacturing, motor production, PCB assembly, and electronics sectors worldwide.

Material Features

Mara Tape — ≥5kV Dielectric Strength for Transformer Winding

Biaxially oriented deep yellow PET film provides dielectric strength ≥ 5kV — delivering reliable inter-layer electrical insulation for transformer coils, inductors, and motor windings. The deep yellow color follows the color-coding convention used in many transformer production specifications for Class B (130°C) and Class F (155°C) insulation systems.

Deep Yellow Mylar Insulation Tape — Dimensional Stability

Thisdeep yellow polyester acrylic tape maintains dimensional stability under the mechanical tension of high-speed transformer coil winding machines — resisting stretching and deformation during winding operations to ensure consistent inter-layer insulation thickness and reliable dielectric performance throughout the coil assembly.

Deep Yellow PET Tape for PCB Masking — 150°C Heat Resistance

Withstands continuous temperatures up to 150°C and short-term peaks up to 180°C — covering PCB wave soldering bath temperatures, SMT reflow oven profiles, and transformer oven curing cycles without adhesive migration or deep yellow film yellowing or deformation.

Solvent-Based Acrylic Adhesive — Varnish & Chemical Resistance

Thispolyester tape uses solvent-based acrylic adhesive — offering superior resistance to transformer impregnation varnishes, PCB cleaning solvents, and industrial chemicals versus rubber-based alternatives, with clean residue-free removal from copper windings, PCB pads, and enameled wire surfaces.

Clean & Stable Removal

Leaves zero adhesive residue after removal — critical for PCB masking (where adhesive contamination on gold fingers impacts contact reliability) and transformer production (where residue between winding layers can degrade long-term insulation performance).

Applications of Deep Yellow Polyester Acrylic Tape (Mara Tape)

• Mara Tape for Transformer Winding — Inter-Layer Insulation
  The primary application for deep yellow Mara tape — used as inter-layer insulation between copper winding layers in power transformers, distribution transformers, inductors, and switching power supply transformers. Dielectric strength ≥ 5kV ensures reliable electrical separation between winding layers throughout the transformer service life.
• Deep Yellow PET Tape for PCB Masking — Wave Soldering & SMT Reflow
  Protects gold fingers, edge connectors, test points, and solder-free zones during PCB wave soldering, SMT reflow, and selective soldering processes — deep yellow color provides clear visual identification of masked areas on PCB production lines, and clean peel-off protects pad surfaces and contact integrity.
• Mylar Insulation Tape — Motor Coil & Capacitor Wrapping
  Used for wrapping motor stator coils, rotor windings, and capacitor assemblies — this deep yellow Mylar tape provides reliable electrical insulation and mechanical protection, compatible with varnish impregnation and oven curing processes in motor and capacitor manufacturing.
• Electrical Insulation — Ballast, Relay & Power Supply Components
  Applied in electronic ballasts, relay coils, and switching power supply assemblies for inter-winding insulation and component wrapping — the deep yellow color follows electrical insulation color-coding conventions used in electronic component manufacturing quality standards.
• Lithium Battery Cell Wrapping & EV Battery Insulation
  Used for cell-level insulation wrapping in lithium battery packs — the deep yellow PET backing provides mechanical protection and electrical isolation between battery cells, compatible with the high-temperature environments of battery formation and aging processes.

  Customization Options

• Width & length customization
• Thickness: 0.038mm – 0.15mm, or custom
• Color options: deep yellow, green, yellow, black, transparent, pink, blue, orange, red, amber, purple, white, custom
• Logo printing & OEM packaging
• Die-cutting to specific shapes or sizes

• Packaging & Delivery

• Standard roll packaging / customized OEM packaging
• Fast production lead time
• Global shipping: DHL / UPS / FedEx / TNT — 5–8 business days

Q1 | What is deep yellow polyester acrylic tape (Mara tape) used for?

Deep yellow polyester acrylic tape — known as Mara tapeorMylar insulation tape in the electrical industry — is primarily used for transformer coil inter-layer insulation, motor coil wrapping, capacitor assembly, and PCB masking during wave soldering and SMT reflow. It is the standard electrical insulation tape for transformer manufacturers and motor winding shops worldwide.

Q2 | What is Mara tape and why is it deep yellow?

Mara tape is the industry nickname for PET film adhesive tape used in transformer and motor winding insulation — the name originated from historical trade names for polyester film in the transformer manufacturing sector. Deep yellow is the established color for this product category, used as a color-coding convention in many transformer production specifications and quality control standards for Class B and Class F electrical insulation systems.

Q3 | What is the difference between Mara tape and Mylar tape?

BothMara tapeandMylar tape refer to the same product — PET (polyester) film adhesive tape used for electrical insulation."Mylar"is a DuPont brand name for PET film that became a generic industry term, while"Mara"is a regional nickname widely used in Asian transformer and motor manufacturing. Both terms describe this deep yellow polyester acrylic tape.

Q4 | Can deep yellow Mara tape be used for PCB wave soldering masking?

Yes. This deep yellow PET tape bonds securely during PCB wave soldering — withstanding solder bath temperatures, and peeling cleanly without leaving adhesive residue on gold fingers or PCB pads. The deep yellow color provides clear visual confirmation of masked areas on production lines.

Q5 | Do you support OEM customization?

Yes. We offer full OEM services including custom width, thickness, color, die-cutting, and private label packaging with low MOQ.

Q6 | Are free samples available?

Yes. We provide free samples; express shipping cost is covered by the buyer.

Q7 | What payment methods are accepted?

We accept T/T, PayPal, and L/C.

Q8 | What is the MOQ?

Low MOQ — 1 piece accepted for sample testing. Contact us for bulk order pricing.

Q9 | How long does shipping take?

We ship via DHL, UPS, FedEx, or TNT. Delivery typically takes 5–8 business days worldwide.

Q10 | How is deep yellow Mara tape different from standard yellow polyester tape?

Deep yellow and yellow polyester acrylic tape share the same PET film base and acrylic adhesive chemistry — the key difference is color shade. Deep yellow (darker, more saturated) is the traditional Mara tape color used as the standard in transformer winding specifications and motor coil color-coding conventions. Standard yellow tape is used for general electrical insulation and PCB masking where color-code compliance to transformer winding specifications is not required. Both carry the same 150°C heat resistance and ≥5kV dielectric strength.